The expo will be held indoors at the Royal Trade Center, 181 Boston Post Road West, Marlborough, from 10 a.m. until 4 p.m. Tickets for the event can be purchased online now at wickedlocal.com/kidzexpo for $7 each or $20 for a family four-pack. Ticket prices at the door will be $10 each or $30 for the four-pack. Admission entitles participants to enjoy all of the expo’s activities.

List is well-known for her starring role in the hit Disney series “Jessie” and Fox’s “Diary of a Wimpy Kid” film franchise, among scores of other film and television credits. She currently stars as Emma Ross in “Bunk’d,” a spinoff of the popular “Jessie” series.

Kidz Expo will feature a variety of inflatable attractions, balloon artists, magicians, a caricature artist, contest drawings, giveaways, live performances and scores of vendors. In addition, List will be available for fan photos, as will roaming superhero and cartoon characters such as Captain America, Spider-Man and more. The first 200 children to join the fun will receive a free Kidz Expo backpack.

The venue, at 181 Boston Post Road West, in Marlborough, includes plenty of free parking.